Base Ten Block Rounding

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Unit 5 – Lesson 1
Number Concepts
Student Expectation: Students will round numbers using Base Ten Blocks
Reteach
Rounding Numbers
K
“Base Ten Block Rounding”
C
Teacher note: In this Reteach, students will use Base Ten Blocks to model a number to be
rounded and then determine how to round it.
Group size: two to three students
Materials: Base Ten Blocks (provided in Unit 1); problems, pages 35-36; notebook paper;
pencils; answer key, page 42
Before class: Make a set of Base Ten Blocks for each group. Copy pages 35-36 for each
group.
Directions:
• Give each group pages 35-36 and a set of Base Ten Blocks (9 hundreds, 9 tens, and 9
ones).
• Have groups model each problem and then answer the questions on paper.
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Gourmet Curriculum Press, Inc.©
Unit 5 – Lesson 1
Number Concepts
Student Expectation: Students will round numbers using Base Ten Blocks
Reteach—Problems
Rounding Numbers
“Base Ten Block Rounding”
Rounding to the nearest ten.
Use the following questions to answer each of the problems 1-5.
A Are there 5 or more ones?
B Are there less than 5 ones?
C Should you round up or down? Justify your answer.
D What is the rounded number?
1. Using the Base Ten Blocks, model the number 64.
2. Using the Base Ten Blocks, model the number 86.
3. Using the Base Ten Blocks, model the number 173.
4. Using the Base Ten Blocks, model the number 596.
5. Using the Base Ten Blocks, model the number 81.
Gourmet Curriculum Press, Inc.©
35
Unit 5 – Lesson 1
Number Concepts
Student Expectation: Students will round numbers using Base Ten Blocks
Reteach—Problems
Rounding Numbers
“Base Ten Block Rounding”
Rounding to the nearest hundred.
Use the following questions to answer each of the problems 6-10.
A Are there 5 or more tens?
B Are there less than 5 tens?
C Should you round up or down? Justify your answer.
D What is the rounded number?
6. Using the Base Ten Blocks, model the number 354.
7.
Using the Base Ten Blocks, model the number 278.
8. Using the Base Ten Blocks, model the number 349.
9. Using the Base Ten Blocks, model the number 481.
10. Using the Base Ten Blocks, model the number 537.
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Gourmet Curriculum Press, Inc.©